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    Java中的Java.util.EnumMap.clone()方法用于将一个映射的映射值复制到另一个映射。它基本上创建了这个EnumMap的浅表副本。

    句法:

    Enum_map_2 = Enum_map_1.clone()

    参数:该方法不接受任何参数。

    返回值:该方法返回EnumMap的浅表副本。

    下面的程序说明了Java.util.EnumMap.clone()方法

    Java.util.EnumMap.clone()程序1:

    // Java program to demonsrate clone() method
    import java.util.*;
     
    // An enum of fruits price is created
    public enum Price_of_Fruits {
        Orange,
        Apple,
        Banana,
        Pomegranate,
        Guava
    };
     
    class Enum_map {
        public static void main(String[] args)
        {
     
            EnumMap<Price_of_Fruits, Integer> mp1 = new EnumMap<Price_of_Fruits, Integer>(Price_of_Fruits.class);
     
            EnumMap<Price_of_Fruits, Integer> mp2 = new EnumMap<Price_of_Fruits, Integer>(Price_of_Fruits.class);
     
            // Values are associated in mp1
            mp1.put(Price_of_Fruits.Orange, 30);
            mp1.put(Price_of_Fruits.Apple, 60);
            mp1.put(Price_of_Fruits.Banana, 40);
            mp1.put(Price_of_Fruits.Pomegranate, 120);
            mp1.put(Price_of_Fruits.Guava, 20);
     
            // Price of fruits in mp1
            System.out.println("Price of fruits in 1st map " + mp1);
     
            // Copying the values of mp1 to mp2
            mp2 = mp1.clone();
     
            // Price of fruits in mp2
            System.out.println("Price of fruits in 2nd map " + mp2);
        }
    }
    

    输出:

    Price of fruits in 1st map {Orange=30, Apple=60, Banana=40, Pomegranate=120, Guava=20}
    Price of fruits in 2nd map {Orange=30, Apple=60, Banana=40, Pomegranate=120, Guava=20}

    Java.util.EnumMap.clone()程序2:

    // Java program to demonsrate clone() method
    import java.util.*;
     
    // An enum of gfg ranking is created
    public enum gfg_ranking {
        Global_2018,
        India_2018
    };
     
    class Enum_map {
        public static void main(String[] args)
        {
     
            EnumMap<gfg_ranking, Integer> mp1 = new EnumMap<gfg_ranking, Integer>(gfg_ranking.class);
     
            EnumMap<gfg_ranking, Integer> mp2 = new EnumMap<gfg_ranking, Integer>(gfg_ranking.class);
     
            // Values are associated in mp1
            mp1.put(gfg_ranking.Global_2018, 800);
            mp1.put(gfg_ranking.India_2018, 72);
     
            // Price of fruits in mp1
            System.out.println("GeeksforGeeks ranking in first map " + mp1);
     
            // Copying the values of mp1 to mp2
            mp2 = mp1.clone();
     
            // Price of fruits in mp2
            System.out.println("GeeksforGeeks ranking in second map " + mp2);
        }
    }
    

    输出:

    GeeksforGeeks ranking in first map {Global_2018=800, India_2018=72}
    GeeksforGeeks ranking in second map {Global_2018=800, India_2018=72}

     
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